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FireWire ICs deliver multiple options

Posted: 25 Nov 2008 ?? ?Print Version ?Bookmark and Share

Keywords:IC FireWire? 1394 IEEE? power portable?

Three new IEEE 1394 FireWire ICs from LSI Corp. offers designers a range of options to support the latest in 1394 performance and the power savings required in portable products. The TrueFIRE family includes options for both the 800Mbit/s 1394b standard and the earlier 400Mbit/s 1394a standard. LSI claims that the new ICs reduce power by 17 percent relative to prior-generation products.

The new announcements include the FW643E 1394b controller, the FW533 1394a controller, and the FW843 1394b PHY (physical layer interface). The FW643E supports performance-intensive peripherals both through the fastest flavor of FireWire and through a PCIe link to the host computer. LSI claims the IC offers 13 percent faster performance than the competing Texas Instruments' XIO2213.

The FW843 PHY requires a low-cost crystal and a single power supply whereas many such PHYs require multiple supplies. The design is tuned for low-power and applications such as laptop PCs. The FW643E and FW533 are shipping now and the FW843 will ship in Q1 09.

- Maury Wright
Digital Home DesignLine

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